Michigan Esthetician State Board Practice Exam

Which statement best describes the function of a surfactant?

1. It nourishes the skin

2. It improves spread-ability

3. It acts as a preservative

4. It creates a barrier on the skin

The correct answer is: It improves spread-ability

The function of a surfactant revolves around its ability to improve spread-ability. Surfactants are compounds that lower the surface tension between two substances, such as oil and water. This quality allows surfactants to facilitate the even distribution of products across the skin, enhancing their application. By allowing for smoother application and better absorption, surfactants play a crucial role in the formulation of various cosmetic and skincare products. While some surfactants may have additional functions, such as emulsifying or aiding in cleansing, their primary and most notable attribute in the context of skincare is how they help products to spread more easily on the skin's surface. This property is essential for achieving effectiveness and uniformity in product application.